/***************************************************************************
*************** Calculates waypoints for AI *************
**************************************************************************/
void DriverAI::calcWaypoints(SceneManager *sm, int idStart, int idEnd) {
//Get list of tiles that will be crossed
vector<int> tilePath = getTilePath(sm, idStart, idEnd);
//Create waypoint at the edges where one tiles meets the next
waypoints.clear();
waypoints = convertTilePathToEdgePath(sm, tilePath);
}
/**
* @brief Gets a Tile where the image data can be stored. If the Tile isn't cached a new Tile is returned.
*
* @param ti A shared pointer to the TileIdentifier of the Tile.
**/
shared_ptr<Tile> Cache::getTile(const shared_ptr<TileIdentifier>& ti)
{
// TODO: Finer Synchronization
GlobalCacheLock.lock();
shared_ptr<CacheOfOneStylesheet> cache;
const string& stylesheet = ti->getStylesheetPath();
auto cacheIt = AllCaches.find(stylesheet);
if (cacheIt != AllCaches.end()) {
// Found cache for Stylesheet.
cache = cacheIt->second;
} else {
// Creating a new cache for stylesheet.
cache = boost::make_shared<CacheOfOneStylesheet>();
AllCaches[stylesheet] = cache;
boost::filesystem::path dir(Config->get<string>(opt::server::cache_path) + "/" + ti->getStylesheetPath());
boost::filesystem::create_directories(dir);
log << log4cpp::Priority::DEBUG << "Stylesheetcache " << stylesheet << " created.";
}
// Get tile from map
shared_ptr<Tile> tile;
auto tileIt = cache->find(*ti);
if (tileIt != cache->end()) {
// Cache hit
tile = tileIt->second.first;
RecentlyUsedList.erase(tileIt->second.second);
RecentlyUsedList.push_front(tileIt->second.first);
tileIt->second.second = RecentlyUsedList.begin();
} else {
// Cache miss
tile = boost::make_shared<Tile>(ti);
if (ti->getZoom() <= Config->get<int>(opt::server::cache_keep_tile)) {
// Try to load prerendered image data from file.
boost::filesystem::path path = getTilePath(ti);
Tile::ImageType image = boost::make_shared<Tile::ImageType::element_type>();
try {
readFile(image, path);
tile->setImage(image);
} catch (excp::FileNotFoundException) {
log << log4cpp::Priority::DEBUG << "readFile: Not found: " << path.string();
}
}
RecentlyUsedList.push_front(tile);
cache->insert(std::make_pair(*ti, CacheElement(tile, RecentlyUsedList.begin())));
}
while (RecentlyUsedList.size() > Config->get<int>(opt::server::cache_size)) {
shared_ptr<Tile> tileToDelete = RecentlyUsedList.back();
// Evict a Tile when cache is full.
if (tileToDelete->getIdentifier()->getZoom() <= Config->get<int>(opt::server::cache_keep_tile)) {
// Evict to hard drive.
shared_ptr<TileIdentifier> tiToDelete = tileToDelete->getIdentifier();
boost::filesystem::path path = getTilePath(tiToDelete);
try {
writeFile(tileToDelete, path);
} catch (excp::FileNotFoundException) {
log << log4cpp::Priority::DEBUG << "WriteFile: Could not open file " << path.string();
// Disk is full
} catch (excp::InputFormatException) {
log << log4cpp::Priority::DEBUG << "WriteFile: Image not yet rendered " << *tile->getIdentifier();
RecentlyUsedList.push_front(tileToDelete);
cacheIt = AllCaches.find(tileToDelete->getIdentifier()->getStylesheetPath());
if (cacheIt != AllCaches.end()) {
cacheIt->second->erase(*tileToDelete->getIdentifier());
cacheIt->second->insert(std::make_pair(*tiToDelete, CacheElement(tileToDelete, RecentlyUsedList.begin())));
}
RecentlyUsedList.pop_back();
break;
}
}
// Delete tile
log << log4cpp::Priority::DEBUG << "Deleting least recently used Tile." << *tileToDelete->getIdentifier();
cacheIt = AllCaches.find(tileToDelete->getIdentifier()->getStylesheetPath());
if (cacheIt != AllCaches.end()) {
cacheIt->second->erase(*tileToDelete->getIdentifier());
}
RecentlyUsedList.pop_back();
}
GlobalCacheLock.unlock();
return tile;
}
